package servlet;

import com.jspsmart.upload.File;
import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspFactory;
import javax.servlet.jsp.PageContext;
import java.io.IOException;

@WebServlet(urlPatterns = "/upload")
public class UploadServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        try {
            // 1. 创建上传文件的对象
            SmartUpload upload = new SmartUpload();
            // 2. 初始化上传操作
            PageContext pageContext = JspFactory.getDefaultFactory()
                    .getPageContext(this, req, resp, null, false, 1024, true);
            upload.initialize(pageContext);
            // 2.1 设置编码
            upload.setCharset("utf-8");
            // 3. 上传
            upload.upload();

            // 4. 获取文件信息
            File file = upload.getFiles().getFile(0);
            String fileName = file.getFileName();
            String contentType = file.getContentType();
            // 4'. 获取文本信息
//        String uname = upload.getRequest().getParameter("uname");
//        System.out.println("uname=" + uname);

            // 5. 指定上传的路径
            String uploadpath = "/uploadfiles/" + fileName;
            // 6. 保存到指定路径
            file.saveAs(uploadpath, File.SAVEAS_VIRTUAL);

            // 7. 跳转页面
            req.setAttribute("filename", fileName);
            req.getRequestDispatcher("index.jsp").forward(req, resp);
        } catch (SmartUploadException e) {
            e.printStackTrace();
        }

    }
}
